What is the correct speed and gear ratio?

[Cody]

Correct speed and gear matching standards involve shifting up while accelerating, following sequential gear changes without skipping gears, accelerating first before shifting up. Below is the matching relationship between gears and speeds: 1. Start in first gear, generally used for speeds below 15 km/h. Suitable for uphill roads, traffic jams, muddy or wet roads, and foggy conditions. 2. Shift to second gear when reaching 15 km/h. Second gear is also used for uphill roads, turns, narrow roads, and hazy conditions. 3. If driving at around 30 km/h, third gear is appropriate. Shift to fourth gear at 40 km/h, and use fifth gear for speeds above 50 km/h. These are normal driving speeds, chosen based on road conditions. 4. For upshifting, accelerate first and then shift up. For downshifting, decelerate first and then shift down. This means matching the gear to the current speed to avoid lugging the engine, ensuring proper matching. The correct operation is to adjust speed first, then shift gears. Upshifting must be done sequentially, without skipping gears. The same principle applies to downshifting—decelerate first, then shift down—but downshifting can skip gears. Based on road and traffic conditions, reduce to a safe speed and then directly shift to the corresponding gear.